<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
    <title>建设中</title>
    <style>
        *{
            margin: 0;
            padding: 0;
        }
        html{
            height: 100%;
        }
        body{
            display: flex;
            align-items: center;
            justify-content: center;
            height: 100%;
        }
        div{
            font-size: 30px ;
            color: #c1c1c1;
        }
    </style>
</head>
<body>
<div>建设中...</div>
</body>
</html>
